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Eglantine or sweet briar rose, Eglantine rose, rosier églantier, small-flower sweetbrier, sweet-briar rose, sweet-brier, sweetbrier rose

dog rose, rosier des chiens

Habit Shrubs, erect; not rhizomatous. Shrubs, arching, not rhizomatous.
Stems

10–30 dm;

distal branches arching, bark dark brownish red;

infrastipular prickles single or paired, curved, falcate, 6–12 × 3–7 mm, lengths varying or ± uniform, internodal prickles sometimes mixed with aciculi and glandular setae.

usually erect to sprawling, 10–25(–50) dm;

distal branches arching, bark green;

infrastipular prickles paired, curved or appressed, 6–7 × 4–9 mm, lengths ± uniform, internodal prickles rare, single, rarely absent.

Leaves

persistent, 4–6.5 cm;

stipules 6–10 × 2–4 mm, auricles 3–5 mm, margins stipitate-glandular, surfaces glabrous, eglandular;

petiole and rachis with pricklets, puberulent, stipitate-glandular;

leaflets 5–7(–9), viscid glands with ripe apple scent, terminal: petiolule 5–10 mm, blade mostly suborbiculate or broadly oval, 10–25 × 8–15 mm, base obtuse, margins 2- or multi-serrate, teeth 10–18 per side, apex acute to obtuse, abaxial surfaces glabrous or pubescent, usually densely viscid-glandular, adaxial green, lustrous to dull, puberulent or glabrous.

deciduous, 6–11 cm;

stipules 10–22 × 3–5 mm, auricles 3–5 mm, margins stipitate-glandular or eglandular, surfaces glabrous, eglandular or sparsely stipitate-glandular;

petiole and rachis sometimes with pricklets, glabrous, eglandular;

leaflets 5–7, terminal: petiolule 5–11 mm, blade ovate, obovate, or elliptic, 15–40 × 12–20 mm, base obtuse to slightly cuneate, margins 1- or multi-serrate, teeth 20–30 per side, apex acute, sometimes acuminate, abaxial surfaces glabrous, rarely pubescent or tomentose on midveins, eglandular, adaxial dark green to green, lustrous to dull, glabrous, rarely tomentose.

Inflorescences

panicles, 1–3(–7)-flowered.

panicles, sometimes corymbs, solitary, sometimes 2 or 3(–7)-flowered.

Pedicels

erect, 6–9 mm, densely stipitate-glandular, sometimes mixed with aciculi [and setae];

bracts 2, ovate-lanceolate to lanceolate, 15 × 5 mm, margins stipitate-glandular, surfaces glabrous, eglandular.

erect to reflexed as hips mature, 8–20 mm, eglandular or stipitate-glandular;

bracts 2, ovate-lanceolate, 6–18 × 4–5 mm, margins glandular-serrate, abaxial surfaces puberulent, adaxial surfaces glabrous, eglandular.

Flowers

2–4 cm diam.;

hypanthium obovoid or broadly oblong, 5–6 × 3–4 mm, eglandular, neck (0–)1–1.5 × 3–4 mm;

sepals erect or spreading, rarely reflexed, lanceolate or ovate-lanceolate, 14–18 × 2 mm, margins mostly pinnatifid, tip 3–5 × 0.5–1 mm, abaxially densely stipitate-glandular;

petals bright or deep pink, 11–20 × 11–18 mm;

carpels 25–45, styles villous or glabrous, exsert 1–2 mm beyond stylar orifice (1.2–2 mm diam.) of hypanthial disc (2.5–4 mm diam.).

3.5–5 cm diam.;

hypanthium narrowly urceolate, 7–9 × 3–6 mm, eglandular, neck 2–3 × 1–2 mm;

sepals appressed-reflexed, spreading, or erect, ovate-lanceolate, 10–17 × 3–5 mm, margins deeply pinnatifid, tip 4–6 × 0.5 mm, abaxially eglandular;

petals rose, pink, or white, sweet-scented, 18–25 × 15–18 mm;

carpels 26–36, styles villous, exsert 1–2 mm beyond stylar orifice (0.7–1.5 mm diam.) of hypanthial disc (4–5 mm diam.).

Hips

dark red, subglobose to broadly ovoid, ellipsoid, or pyriform, 10–25 × 7–22 mm, glabrous, sometimes setose, eglandular;

sepals tardily deciduous, mostly erect.

red, globose, ovoid, urceolate, or ellipsoid, 10–16(–24) × 6–16 mm, glabrous, eglandular;

sepals deciduous as hips mature, reflexed.

Achenes

15–25, tan, 3.5–4(–5) × 2–2.5(–3) mm.

14–23, tan, 5–6 × 3–3.5 mm.

2n

= 35, 42.

= 35.

Rosa rubiginosa

Rosa canina

Phenology Flowering May–Jul.
Habitat Foothills, woodlands, along roads and railways, abandoned homesteads, riparian habitats
Elevation 0–700 m (0–2300 ft)
Distribution
from FNA
AL; AR; CA; CO; CT; DC; DE; GA; IA; ID; IL; IN; KS; KY; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; NE; NH; NJ; NY; OH; OK; OR; PA; RI; SC; TN; TX; UT; VA; VT; WA; WI; WV; WY; BC; NB; NF; NS; ON; PE; QC; Europe; w Asia; n Africa [Introduced widely worldwide]
[WildflowerSearch map]
[BONAP county map]
from FNA
AL; AR; AZ; CA; CT; ID; IN; KS; KY; MA; MD; ME; MI; MO; NC; NE; NY; OH; OR; PA; RI; TN; UT; VA; VT; WA; WI; WV; BC; NB; NS; ON; QC; Europe; wc Asia (Turkmenistan); n Africa [Introduced in North America; introduced also in Mexico, Central America, South America, Pacific Islands (New Zealand), Australia]
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 2 (2 in the flora).

Rosa rubiginosa has been introduced throughout Canada and the United States except the desert southwest. Plants are compact, upright shrubs without rhizomes. Stems have stout, falcate infrastipular prickles mixed with internodal prickles, aciculi, and glandular setae. Leaflet blades are densely viscid-glandular with ripe apple scent and margins 2- or multi-serrate with stipitate glands.

Rosa eglanteria Linnaeus is a formally rejected name that pertains here.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Rosa canina occurs sporadically throughout Canada and the United States in disturbed areas. Shrubs lack rhizomes and have arching stems with paired or single curved infrastipular prickles all more or less uniform in length. Sepals (abaxially), stipules, petioles, rachises, pedicels, blades (abaxially, except some veins), hypanthia, and hips are all glabrous and most are also eglandular.

W. J. Bean (1970–1988) cited Rosa canina var. corymbifera (Borkhousen) Rouy, R. canina var. dumetorum (Thuillier) Baker, and R. dumetorum as synonyms of R. corymbifera, and that treatment is followed here.

Moderate evidence exists for the efficacy of powdered achenes and hip receptacles of Rosa canina to treat patients suffering from osteoarthritis, specifically of the knee and hip (K. Winther et al. 2005; C. Chrubasik et al. 2006).

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Distal branches: prickle lengths varying, aciculi and setae sometimes present; hips 10–25 × 10–22 mm; flowers 2.5–4 cm diam., sepals deciduous as or after hips mature, styles usually villous, stylar orifices 1/3 diam. of rims 4 mm diam.
var. rubiginosa
1. Distal branches: prickle lengths ± uniform, aciculi and setae absent; hips 10–12 × 7–9 mm; flowers 2–3.5 cm diam., sepals deciduous before or as hips mature, styles usually glabrous, stylar orifices 1/5–1/6 diam. of rims 2.5–4 mm diam.
var. nemoralis
Source FNA vol. 9, p. 90. FNA vol. 9, p. 90.
Parent taxa Rosaceae > subfam. Rosoideae > tribe Roseae > Rosa > subg. Rosa > sect. Caninae Rosaceae > subfam. Rosoideae > tribe Roseae > Rosa > subg. Rosa > sect. Caninae
Sibling taxa
R. acicularis, R. arkansana, R. blanda, R. bracteata, R. bridgesii, R. californica, R. canina, R. carolina, R. cinnamomea, R. foliolosa, R. gallica, R. glauca, R. gymnocarpa, R. laevigata, R. lucieae, R. minutifolia, R. mollis, R. multiflora, R. nitida, R. nutkana, R. palustris, R. pinetorum, R. pisocarpa, R. rugosa, R. setigera, R. sherardii, R. spinosissima, R. spithamea, R. stellata, R. tomentosa, R. virginiana, R. woodsii
R. acicularis, R. arkansana, R. blanda, R. bracteata, R. bridgesii, R. californica, R. carolina, R. cinnamomea, R. foliolosa, R. gallica, R. glauca, R. gymnocarpa, R. laevigata, R. lucieae, R. minutifolia, R. mollis, R. multiflora, R. nitida, R. nutkana, R. palustris, R. pinetorum, R. pisocarpa, R. rubiginosa, R. rugosa, R. setigera, R. sherardii, R. spinosissima, R. spithamea, R. stellata, R. tomentosa, R. virginiana, R. woodsii
Subordinate taxa
R. rubiginosa var. nemoralis, R. rubiginosa var. rubiginosa
Synonyms R. corymbifera, R. dumetorum, R. montezumae
Name authority Linnaeus: Mant. Pl. 2: 564. (1771) Linnaeus: Sp. Pl. 1: 491. (1753)
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